From the following devices, which one is a Layer 1 device in the OSI model? (2024)

FAQs

From the following devices, which one is a Layer 1 device in the OSI model? ›

Which of the following devices operates at the OSI model Layer 1? A hub operates at OSI model Layer 1 (Physical layer). It regenerates electrical signals and sends those signals out all hub ports without regard to the upper-layer data. A switch operates at the OSI model Layer 2 (Data Link layer).

Layer 1 of The OSI Model: Physical Layer defines electrical and physical specifications for devices. The physical layer defines the relationship between a device and a transmission medium, such as a copper or optical cable.

Explanation. Hubs are considered Layer 1 devices because they forward data using physical layer standards. Hubs create one collision domain and one broadcast domain in its ports; this is because when hubs receive electrical signals from one port, they repeat it into all other ports, except the one it came into.

The device that operates at Layer 1 of the OSI model is a Hub.

A switch is usually a layer 2 device and modem is layer 1 device, but the router, which is between both of them, is layer 3.

OSI Layer 1 – Physical

The Physical layer of the OSI model is responsible for the transfer of bits — the 1's and 0's which make up all computer code. This layer represents the physical medium which is carrying the traffic between two nodes. An example would be your Ethernet cable or Serial Cable.

Examples of Layer 1 blockchains include Bitcoin, Ethereum, and Cardano. These blockchains handle the processing and security of a cryptocurrency network through a common consensus mechanism, such as proof of work (PoW) or proof of stake (PoS).

A network switch is a Layer 2 device on the OSI model. A router is primarily a Layer 3 device. A router moves data between two or more computer networks, while a switch facilitates the sharing of resources by connecting multiple devices on a single LAN.

LAYER 1 - The physical layer in the wired world consist of connectors, cables, fiber, and gbics. This is also the layer where data gets transmitted / received into bits, 0's and 1's using complex coding and modulations. LAYER 2 - The data layer is where upper layer information (Layers 3-7) is encapsulated into a frame.

Is WiFi Layer 1 or 2? ›

As a rule of thumb, WiFi (802.11) operates at the first two layers of the OSI model, in other words, the physical layer and the data link layer. Broadly speaking, Physical Layer issues can be split into two main groups: outage and performance issues.

Ethernet is a layer 2 data link protocol that is widely used with the TCP/IP protocol, which resides at layers 3 and 4.

A modem is part of the data link layer (layer 2) and connects an internal network to the external Internet. This device essentially brings the Internet to a home network or facility's network.

LAYER 1 - The physical layer in the wired world consist of connectors, cables, fiber, and gbics. This is also the layer where data gets transmitted / received into bits, 0's and 1's using complex coding and modulations. LAYER 2 - The data layer is where upper layer information (Layers 3-7) is encapsulated into a frame.

Layer 3 (Network): This layer determines how data is sent to the receiving device. It's responsible for packet forwarding, routing, and addressing. Layer 2 (Data Link): Translates binary (or BITs) into signals and allows upper layers to access media. Layer 1 (Physical): Actual hardware sits at this layer.

Layer 1 provides the physical infrastructure and encoding schemes, ensuring that data can traverse the network medium accurately. Layer 2 builds upon this foundation, framing data and enabling devices to communicate efficiently.